CN2786424Y

CN2786424Y - Illuminance enhanced desk lamp

Info

Publication number: CN2786424Y
Application number: CNU2005200695331U
Authority: CN
Inventors: 王保安
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-03-02
Filing date: 2005-03-02
Publication date: 2006-06-07
Anticipated expiration: 2015-03-02

Abstract

The utility model discloses a green illuminance enhancing desk lamp which comprises a lamp holder (5) at both ends of a supporting frame (4), and a lamp shade (2) provided with a built-in light source, wherein the light source is particularly formed by diodes (3) emitting white light; the diodes (3) are distributed on the inner wall of each lamp shade (2) in a gradient density variable mode; moreover, an illuminance controller (7) is arranged between an input end of the diodes and a power supply; the diodes (3) are arranged on the lamp shade (2) in an annular mode, and distances between each two loop wires are equal; distances of each diode (3) on the same loop wire are equal; moreover, distances between each two points on each loop wire from the outermost loop wire to the inner loop wires are changed according to the density change of Li=7+i (i=0, 2, 5, 9, 14, and so on); the illuminance controller (7) is formed by the method that after respectively connected with a clock circuit and passes through a nand gate, a monolithic computer 89C51 is connected with a 74LS164 integrated block, a 75452 integrated block, etc. The utility model not only has no infrared and ultraviolet ray radiation, and the uniformity ratio of illuminance can reach more than 80 percents, but also can meet the requirement that the illuminance can be enhanced with the extension of reading or working time so as to be suitable for human vision.

Description

Green increases according to desk lamp

Technical field the utility model relates to a kind of desk lamp, and especially green increases according to desk lamp.

Background technology is present, and people often use desk lamp, as various commercially available in order to read or work on darker table top.Its many lampshade by the support that sets gradually on the lamp socket, built-in light source etc. constitute, and wherein, the light source multiselect is with incandescent lamp bulb or fluorescent tube.During use, the visible light that incandescent lamp bulb or fluorescent tube send directive table top directly and after the lampshade reflection.But this desk lamp exists weak point, at first, as the light that incandescent lamp bulb or fluorescent tube sent of light source and be not only visible light, wherein contain a certain amount of infrared light and ultraviolet light, read under this light source or work for long-term low coverage is liftoff, eyesight will be subjected to cumulative damage; Secondly, though the reflection of lampshade is arranged, but the illumination uniformity on its reading face or the working face is still lower, after tested, illuminance uniformity in diameter 40 cm range all fails to reach 50%, read down or work in this type of light source, the visual effect of human eye and visual fatigue is variation and increasing the weight of significantly; Once more, recent experiment conclusion shows, the people read or the state of mind of work with reading or the illumination of the illumination background when working relevant, the people can energetic read purposefully or work in the time that is continued, the illumination of needed reading face of vision or working face answers the trend of proportional example to increase, and the illumination intensity of light source of existing desk lamp then is unalterable.

The summary of the invention the technical problems to be solved in the utility model provides a kind of rational in infrastructure for overcoming weak point of the prior art, and practical green increases according to desk lamp.

The technical scheme that is adopted comprises the lamp socket at support two ends and the lampshade of built-in light source, particularly said light source is the diode of coloured light of turning white, said diode variable density in gradient is dispersed throughout on the inwall of lampshade, and is serially connected with the illuminance controller between its input and power supply.

As the further improvement of technical scheme, described diode is provided with on lampshade ringwise, wherein, is equidistantly between each loop wire, and each diode is equidistantly on same loop wire, and the spacing of the point-to-point transmission on each loop wire that encircles in the outermost hoop is by L _i=7+i (i=0,2,5,9,14,20,27 ...) variable density; The loop wire of described diode on lampshade is 4; The pin XTAL1 that described illuminance controller is single-chip microcomputer 89C51, cross-over connection clock circuit between XTAL2, pin P1.7, the trigger end cp pin of P3.1 six 74LS164 integrated packages of tap after NAND gate, pin P3.0 meets in aforementioned six 74LS164 integrated packages first A, the B pin, the A of back five every 74LS164 integrated packages of merely hitting, the B pin connects the Q1～Q7 pin of last 74LS164 integrated package respectively, the input of the Q1 of every 74LS164 integrated package～Q7 pin and one 75452 integrated package joins, and the output of every 75452 integrated package connects resistance grounded again behind eight diodes respectively; The emergent pupil place of described lampshade is equipped with the flat mirror of rib band.

Beneficial effect with respect to prior art is, one, the diode of selecting the coloured light that turns white for use is as light source, because of its luminous spectral region only between 400～770nm, not only covered people's the visible panchromatic light of vision, make less than the ultraviolet light of 400nm with greater than the radiation of the infrared light of 770nm and be zero, thereby stopped the radiation of infrared light and ultraviolet light, avoided its cumulative damage fully to eyesight, and also has colour temperature about the 6405K of human eye vision sensitivity the best and colour rendering good (Ra 〉=85), very, the characteristics that vision requires have been catered near the natural daylight of window of opportunity.In addition, from the luminous spectrum line chart of the diode of the coloured light that turns white as can be known, its spectral radiance has a peak value near 460nm, this peak value had both improved the colour temperature of light, again health was had health-care effect, because modern science discloses, people's skin is when being subjected to illumination, and subcutaneous cholesterol to the auroral poles of wavelength 350～460nm photochemical biochemical reaction takes place easily, and cholesterol is changed into vitamin D, the direct result of this biochemical process is that the cholesterol of human body descends, and the absorption of calcium increases.In addition, what adopt as the diode of light source is low-voltage DC supply, except that safe in utilization, the strobe light that does not also have the harm vision occurs, and to discharge photon luminous because of its principle of luminosity series electron energy level transition, so electric light transformation efficiency height, high energy-conservation, noiselessness, zero start, cold light, long-lived and no any related pollution (mercury pollution being arranged) as fluorescent lamp; Its two, the diode of the coloured light that will turn white variable density in gradient is dispersed throughout on the inwall of lampshade, makes it be transformed into area source by spot light, improved the illumination uniformity on the face to be illuminated widely, test result shows that its illuminance uniformity has far surpassed 50%, up to 75%; Its three, be used in diode be set on the lampshade ringwise, make between each loop wire for equidistantly, for equidistantly, and the spacing of the point-to-point transmission on each loop wire that encircles in the outermost hoop is by L on same loop wire for each diode _i=7+i (i=0,2,5,9,14,20,27 ...) and variable density, can make diode in gradient being arranged on of variable density both be easy on the lampshade realize, and can promote the uniformity of illumination again; They are four years old, the use of illuminance controller, As time goes on and little by little illumination on the face to be illuminated can be strengthened automatically, met fully for making the people when reading or work, be in heartily optimum state constantly, its vision should be along with the prolongation of reading or working time, the requirement that the illumination of reading face or working face should increase gradually; Its five, the flat mirror of rib band places the emergent pupil place of lampshade, has both eliminated the dazzle that the diode group of the coloured light that turns white is grown, promoted the illumination uniformity on the face to be illuminated again, and it has been reached 〉=80% even effect.

Description of drawings is described in further detail optimal way of the present utility model below in conjunction with accompanying drawing.

Fig. 1 is a kind of basic structure schematic diagram of the present utility model;

Fig. 2 is the circuit structure diagram of the illuminance controller among Fig. 1;

Fig. 3 is the luminescent spectrum line chart of coloured light diode of turning white, and wherein, abscissa is a wavelength, and ordinate is a luminous intensity;

Fig. 4 is the graph of relation through between illuminance required on people's energy time that energetic work continued of experimental verification repeatedly and its reading or the working face, and wherein, abscissa is the time, and ordinate is an illumination.

The specific embodiment is fixed with support 4, illuminance controller 7 and switch 8 respectively referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4 on the lamp socket 5; The other end of support 4 is fixedly connected with lampshade 2, and the emergent pupil place of lampshade 2 is equipped with the diode 3 that spreads all over the coloured light that turns white on the flat mirror 1 of rib band, its inwall; These diodes 3 all are electrically connected with mains supply through lead 6, illuminance controller 7, rectification reducing transformer, switch 8.Diode 3 is 4 loop wire settings on lampshade 2, spacing between every loop wire is 8mm, every diode 3 is equidistant on same loop wire, wherein, diode 3 on the outermost loop wire is 7mm apart along the loop wire direction, at a distance of being 9mm, at a distance of being 12mm, the diode 3 on the innermost ring line is 16mm apart along the loop wire direction to the diode 3 on the 3rd loop wire to diode 3 on the inferior loop wire along the loop wire direction along the loop wire direction.The middle part of lampshade 2 is equipped with optical loupes 9.Illuminance controller 7 is by single-chip microcomputer 89C51, clock circuit, NAND gate, formations such as many (quantity of the diode 3 that is used by need determines its number of elements) 74LS164 integrated packages and 75452 integrated packages, wherein, the pin XTAL1 of single-chip microcomputer 89C51, the XTAL2 span is connected to clock circuit, the pin P1.7 of single-chip microcomputer 89C51, the trigger end cp pin of P3.1 six 74LS164 integrated packages of tap after NAND gate, the pin P3.0 of single-chip microcomputer 89C51 meets in aforementioned six 74LS164 integrated packages first A, the B pin, the A of back five every 74LS164 integrated packages of merely hitting, the B pin connects the Q1～Q7 pin of last 74LS164 integrated package respectively, the input of the Q1 of every 74LS164 integrated package～Q7 pin and one 75452 integrated package joins, and the output of every 75452 integrated package connects respectively behind eight diodes 3 again through resistance R _i(i=1 or 2 or 3 or 4 or 5 or 6) ground connection.

During use, connect switch 8, civil power 220v is transformed into the direct current of 24v to offer illuminance controller 7 behind the rectification reducing transformer, under the control of the commercial software that illuminance controller 7 is put within it, make progressively conducting of diode all on the lampshade 23, and send panchromatic light shown in curve among Fig. 3, and the initial illumination that makes it is between 800～1000 luxs; Directly behind the flat mirror 1 of rib band, becoming the panchromatic light of free from glare, is the best with the visual effect that satisfies human eye.As time goes on, illuminance controller 7 is automatically being controlled progressively conducting of relevant diode 3, so that it can increase luminous intensity gradually by curve as shown in Figure 4, thereby make the illumination on the face to be illuminated meet the lasting Con brio reading of people or the required lighting requirement of working all the time, the highest illumination can realize 2500 lux standards under the free from glare condition.

Obviously, those skilled in the art can increase according to desk lamp carries out various changes and modification green of the present utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.

Claims

1, a kind of green increases according to desk lamp, comprise the lamp socket (5) at support (4) two ends and the lampshade (2) of built-in light source, it is characterized in that: said light source is the diode (3) of coloured light of turning white, said diode (3) variable density in gradient is dispersed throughout on the inwall of lampshade (2), and is serially connected with illuminance controller (7) between its input and power supply.

2, green according to claim 1 increases according to desk lamp, it is characterized in that diode (3) is provided with on lampshade (2) ringwise, wherein, is equidistant between each loop wire, each diode (3) is equidistantly on same loop wire, and the spacing of the point-to-point transmission on each loop wire that encircles in the outermost hoop is by L _i=7+i (i=0,2,5,9,14,20,27 ...) variable density.

3, green according to claim 2 increases according to desk lamp, it is characterized in that the loop wire of diode (3) on lampshade (2) is 4.

4, green according to claim 1 increases according to desk lamp, it is characterized in that illuminance controller (7) is the pin XTAL1 of single-chip microcomputer 89C51, cross-over connection clock circuit between XTAL2, pin P1.7, the trigger end cp pin of P3.1 six 74LS164 integrated packages of tap after NAND gate, pin P3.0 meets in aforementioned six 74LS164 integrated packages first A, the B pin, the A of back five every 74LS164 integrated packages of merely hitting, the B pin connects the Q1～Q7 pin of last 74LS164 integrated package respectively, the input of the Q1 of every 74LS164 integrated package～Q7 pin and one 75452 integrated package joins, and the output of every 75452 integrated package connects resistance grounded again behind eight diodes (3) respectively.

5, green according to claim 4 increases according to desk lamp, it is characterized in that the emergent pupil place of lampshade (2) is equipped with the flat mirror of rib band (1).